A single-crystal source of path-polarization entangled photons at non-degenerate wavelengths

Details A single-crystal source of path-polarization entangled photons at non-degenerate wavelengths A single-crystal source of path-polarization entangled photons at non-degenerate wavelengths

2008-06-17

arxiv.org/abs/0806.2842v1

Optics Express, Vol. 16 (2008) pp. 9701-9707

Physics

Quantum Physics

7 pages, 3 figures, published in Optics Express (2008)

Scientific paper

10.1364/OE.16.009701

We demonstrate a bright, narrowband, compact, quasi-phase-matched single-crystal source generating path-polarization-entangled photon pairs at 810 nm and 1550 nm at a maximum rate of 3 Mcounts/(s THz mW) after coupling to single-mode fiber, and with two-photon interference visibility above 90%. While the source can already be used to implement quantum communication protocols such as quantum key distribution, this work is also instrumental for narrowband applications such as entanglement transfer from photonic to atomic qubits, or entanglement of photons from independent sources.

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